Nisar Ahmed Siyal, Nargis Ashraf, Faraz Ahmed Farooqui.
23-Guage Vs 20-G Vitrectomy in cases of Proliferative Diabetic Retinopathy, Visual Acuity & Post-operative Complications.
Ophthalmol Update Jan ;14(2):19-22.

Objective: The aim of this study is to compare the complications in post-operative visual acuity in 23-guage vs 20-guage vitrectomy in cases of proliferative diabetic retinopathy (PDR). Methods: A retrospective comparative study was conducted for 44 patients with Proliferative diabetic retinopathy (PDR) at Civil Hospital Ophthalmology Department, Karachi between January 2012 and 2013. Post-operative surgical outcomes, Visual acuity (VA), Intraocular Pressure (IOP) and complications were compared in patients who underwent 20-guage vitrectomy (n= 24) and who underwent 23-guage suture-less vitrectomy technique (n= 20). Paired sample t-test used to compare the means of VA and IOP pre and post-operatively. P-value less than 0.05 considered as significant. Results: Total 44 Patients underwent for surgery include 30(68%) Male and 14(32%) female. Average operation time recorded 99.1�22.5 minutes for 20-G and 92.6�20.1 minutes for 23-G surgery technique. Significant improvement showed when compared pre and post-operative best corrected visual acuity (p-value 1.001) for both groups. Hypotony noted in 5 (14%) eyes after surgery in both groups. Vitreous hemorrhage, cataract, phthisis bulbus, and corneal edema observed in both surgical groups presented in table 1. Moreover ocular hypertension recorded to be in 6 eyes (11%) in 20-g cases and 3 (7%) recorded in 23-g group. No other serious complications observed during or after the surgery. Conclusion: Post-operative outcomes of this study revealed the superiority of 23-guagesuture-less vitrectomy on 20-guage technique.

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